Le 2015-08-19 22:18, walt a écrit :
I'm seeing horrible performance from the xfce window manager (xfwm4) on
my main, everyday machine, but not on an older backup machine or on any
of the linux virtual machines I run on virtualbox.
The symptoms: moving a window with the mouse is so slow as to be
painful, and the CPU usage (on one of four CPUs) jumps to 100% almost
immediately (xfwm4 is the culprit, see below).
If I open an xterm and run (for example) "/usr/bin/marco --replace",
this sluggish behavior returns to normal immediately.
After wasting hours on google I finally noticed that I had compiled
x11-wm/xfwm4 with the xcomposite useflag disabled, so I enabled it and
re-emerged xfwm4.
Now I can get decent performance from xfwm4, but only if first I turn on
compositing by running xfwm4-tweaks-settings. (No, not by running the
puny and feeble xfwm4-settings app: I need to invoke a "tweak" to make
xfce4 an acceptable Desktop Environment on my main desktop machine.
<official rant mode>
I remember going through this same frustration with gnome3, which was
(and is) unusable without installing the gnome-tweak-tool package and
using it to customize settings that I still don't understand.
(That's why I finally gave up on gnome3, and I may yet give up on xfce4
and go back to mate.)
Note that I'm not turning off <official rant mode> yet, but I should
mention that this machine is ~amd64 with ati-drivers-15.7 and vanilla
kernel 3.14.51. (Same problem with gentoo-sources-3.18.19, BTW.)
That is strange, disabling this crap should bring sanity back. I have always
thought that this was designed to slow down PCs that were too fast.
Joke aside, You must be using the "free" video driver, no surprise there, it is junk. Since I could only get the so called free driver on my wife's ATI video I bought her an Nvidia card and installed the proprietary driver, now it works perfectly (with
Mate, I don't really care for gnome 3 or xfwm)
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